Bosch Dryer E04 — Water Container Full
Bosch Dryer · Error code E04
What E04 Means
The condensate collection tank is full and must be emptied before the dryer will continue. Condenser and heat-pump dryers collect water from the drying air.
Symptoms
- Cycle pauses with E04 or container-full icon
- Water container icon illuminated
- Dryer will not start a new cycle
Common Causes
Normal — tank fills after 1-3 cycles depending on load size.
If a drain hose is installed, the pump that lifts water to the tank or drain has failed.
Switch that signals 'tank present and empty' is stuck or dirty.
On hard-plumbed installations, water backs up to the tank and triggers the sensor.
How to Fix It
- Slide out the condensate tank (top-left on most Bosch models) and empty into a sink.
- Reinstall the tank firmly until it seats — listen for the click.
- If error persists, remove the tank again and clean the float and tank seating area with a damp cloth.
- Check that the float inside the tank moves freely.
- If hard-plumbed to a drain, inspect the drain hose for kinks and check that the pump runs (you'll hear it briefly after a cycle).
- Reset by pressing Start; the code should clear once the tank is properly seated and empty.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Bosch Dryer Codes
Verified against manufacturer documentation: bosch-home.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.